Why this is not working?

Hello,
I want to show all posts in one page.
So I create a page template and I put in it the following code:

<?php
/*
Template Name: All posts
*/
?>

<?php get_header(); ?>

<?php if(have_posts()) : ?>
     <?php while(have_posts()) : the_post(); ?>

               <h1><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h1>
               <div class="entry">
                    <?php the_content(); ?>
              </div>

     <?php endwhile; ?>
<?php endif; ?>

<?php get_footer(); ?>

But when I chose this page template in some random page, it’s not showing me the last posts, it’s not showing me nothing actually.

Any help?

Thanks!